1121. THAT WHATEVER THERE IS IN THE WHOLE BODY SERVES A USE TO EACH SINGLE PART In regard to the human body this arcanum as yet lies hidden, that whatever any viscus, or part of a viscus even the least part requires for its nutrition and thus conservation, it derives from the whole body, both in the fluids, that is in the mass of the blood, and in the nonfluids, which must [concur] in affording assistance proximately and more remotely, so that the whole may be for the benefit of the single parts wherever they may be in the body. The single parts also may not regard anything as their own, but as being for the common good when any other part demands it for its use. This is an arcanum in regard to the animate body; but it can be made evident and demonstrated by innumerable things, because it is true.